Solved
STPMIC1APQR-STM32MP157CAA problem with the voltage setting via I2C
Hi,
I encounter an extraordinary problem with STPMIC1APQR. When powering on the board without loading any images voltages on each section are as described in the PMIC documentation. When I start fsbl the voltages change, and increase not as described in the dts.
My dts configuration is as follows
&i2c4{
pinctrl-names = "default", "sleep";
pinctrl-0 = <&i2c4_pins_mx &i2c4_pins_z_mx>;
pinctrl-1 = <&i2c4_sleep_pins_mx &i2c4_sleep_pins_z_mx>;
status = "okay";
/* USER CODE BEGIN i2c4 */
i2c-scl-rising-time-ns = <185>;
i2c-scl-falling-time-ns = <20>;
clock-frequency = <400000>;
/delete-property/ dmas;
/delete-property/ dma-names;
pmic:stpmic@33{
compatible = "st,stpmic1";
reg = <0x33>;
interrupts-extended = <&exti_pwr 55 IRQ_TYPE_EDGE_FALLING>;
interrupt-controller;
#interrupt-cells = <2>;
status = "okay";
regulators{
compatible = "st,stpmic1-regulators";
buck1-supply = <&vin>;
buck2-supply = <&vin>;
buck3-supply = <&vin>;
buck4-supply = <&vin>;
ldo1-supply = <&v3v3>;
ldo2-supply = <&vin>;
ldo3-supply = <&vdd_ddr>;
ldo4-supply = <&vin>;
ldo5-supply = <&vin>;
ldo6-supply = <&v3v3>;
vref_ddr-supply = <&vin>;
boost-supply = <&vin>;
pwr_sw1-supply = <&bst_out>;
pwr_sw2-supply = <&bst_out>;
vddcore:buck1{
regulator-name = "vddcore";
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-initial-mode = <0>;
regulator-over-current-protection;
};
vdd_ddr:buck2{
regulator-name = "vdd_ddr";
regulator-min-microvolt = <1350000>;
regulator-max-microvolt = <1350000>;
regulator-always-on;
regulator-initial-mode = <0>;
regulator-over-current-protection;
};
vdd:buck3{
regulator-name = "vdd";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
st,mask-reset;
regulator-initial-mode = <0>;
regulator-over-current-protection;
};
v3v3:buck4{
regulator-name = "v3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
regulator-over-current-protection;
regulator-initial-mode = <0>;
};
v1v8_audio:ldo1{
regulator-name = "v1v8_audio";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <1800000>;
regulator-always-on;
interrupts = <IT_CURLIM_LDO1 0>;
};
v3v3_emmc:ldo2{
regulator-name = "v3v3_emmc";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
regulator-always-on;
interrupts = <IT_CURLIM_LDO2 0>;
};
vtt_ddr:ldo3{
regulator-name = "vtt_ddr";
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <750000>;
regulator-always-on;
regulator-over-current-protection;
};
vdd_usb:ldo4{
regulator-name = "vdd_usb";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
interrupts = <IT_CURLIM_LDO4 0>;
regulator-always-on;
};
vdda:ldo5{
regulator-name = "vdda";
regulator-min-microvolt = <2900000>;
regulator-max-microvolt = <2900000>;
interrupts = <IT_CURLIM_LDO5 0>;
regulator-boot-on;
};
v1v2_hdmi:ldo6{
regulator-name = "v1v2_hdmi";
regulator-min-microvolt = <1200000>;
regulator-max-microvolt = <1200000>;
regulator-always-on;
interrupts = <IT_CURLIM_LDO6 0>;
};
vref_ddr:vref_ddr{
regulator-name = "vref_ddr";
regulator-always-on;
regulator-over-current-protection;
};
bst_out:boost{
regulator-name = "bst_out";
interrupts = <IT_OCP_BOOST 0>;
};
vbus_otg:pwr_sw1{
regulator-name = "vbus_otg";
interrupts = <IT_OCP_OTG 0>;
};
vbus_sw:pwr_sw2{
regulator-name = "vbus_sw";
interrupts = <IT_OCP_SWOUT 0>;
regulator-active-discharge = <1>;
};
};
onkey{
compatible = "st,stpmic1-onkey";
interrupts = <IT_PONKEY_F 0>, <IT_PONKEY_R 0>;
interrupt-names = "onkey-falling", "onkey-rising";
power-off-time-sec = <10>;
status = "okay";
};
watchdog {
compatible = "st,stpmic1-wdt";
status = "disabled";
};
};
/* USER CODE END i2c4 */
};For instance, buck2 voltage should be no more than 1.35V and I have 1.9V, the same with the core should be no more than 1.2V and is 1.8V, CPU start heating. Bootloader starts with log
NOTICE: CPU: STM32MP157CAA Rev.Z
NOTICE: Model: STMicroelectronics custom STM32CubeMX board - openstlinux-5.15-5
ERROR: nvmem node board_id not found
INFO: PMIC version = 0x21
NOTICE: Reset reason (0x4):
INFO: Pad Reset from NRST
INFO: FCONF: Reading TB_FW firmware configuration file from: 0x2ffe2000
INFO: FCONF: Reading firmware configuration information for: stm32mp_io
INFO: Using USB
INFO: Instance 2
INFO: Boot used partition fsbl1
NOTICE: BL2: v2.6-stm32mp1-r1.0(debug):v2.6-dirty
NOTICE: BL2: Built : 13:14:26, Nov 23 2021
INFO: BL2: Doing platform setup
INFO: RAM: DDR3-DDR3L 16bits 533000kHz
ERROR: DDR addr bus test: can't access memory @ 0xc0000004
PANIC at PC : 0x2ffead6d Of course botting stack on DDR3 memory access problem. What did I do wrong?